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Well said. I'll add on that if you use a framework like Play with hot swap built in, you don't have to worry about restarts.

I'm messing with running Jersey on Jetty right now so I can get HTTP/2 before java 9. Netty and Jetty have both supported it for a while :)

There's still a lot of innovation going on in the Java community you just don't hear about it.

For Jersey + Jetty, it's hard to beat dropwizard (dropwizard.io). I'm sure you've heard of it though ;)